LH4-B800E
5 - 15
5. Troubleshooting guide
5-15. Folding clamp is not raised (1) Pulse motor stepping sound cannot be heard
Cause Check Solution page
Presser foot
height setting
Check the presser foot
height setting.
Change the settings of
memory switch Nos.
04., 05. and 06..
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(Instruction)
Presser foot
lifter pulse
motor
Cord connection Check the cord
connections and
contacts.
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Presser lifter pulse
motor gear
Check for loose gear
set screw.
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